Tests: Add start anchor to paralleltest exclusion regex

[jdtzmn]

Summary

This PR adds a start anchor to the paralleltest exclusion regex within golang CI's configuration file. This fixes incorrect behavior that excluded test files that match package names in subdirectories, such as network_test.go within the netdeploy package.

Paralleltest exclusion regex currently follows a pattern similar to network.*_test\.go to exclude package directories, but this meant that network_test.go was excluded because it began with network. Adding ^ to the start of the regex fixed this issue.

Test Plan

I discovered this behavior while reviewing #4993. I confirmed locally that make lint 2>/dev/null | grep "paralleltest" had no output before these changes and that it now correctly identifies missing parallel flags within netdeploy/network_test.go.

[bbroder-algo]

I think fix is in the original spirit of the regex.

[codecov]

Codecov Report

Merging #5046 (01756ef) into master (285b897) will decrease coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #5046      +/-   ##
==========================================
- Coverage   53.56%   53.56%   -0.01%     
==========================================
  Files         430      430              
  Lines       54092    54092              
==========================================
- Hits        28974    28973       -1     
- Misses      22874    22877       +3     
+ Partials     2244     2242       -2     

Impacted Files	Coverage Δ
agreement/cryptoVerifier.go	67.60% <0.00%> (-2.12%)	⬇️
agreement/proposalManager.go	96.07% <0.00%> (-1.97%)	⬇️
catchup/peerSelector.go	98.95% <0.00%> (-1.05%)	⬇️
cmd/tealdbg/debugger.go	71.65% <0.00%> (-0.79%)	⬇️
ledger/testing/randomAccounts.go	56.26% <0.00%> (-0.62%)	⬇️
ledger/catchpointtracker.go	58.49% <0.00%> (ø)
ledger/acctupdates.go	69.24% <0.00%> (+0.24%)	⬆️
catchup/service.go	69.32% <0.00%> (+0.24%)	⬆️
crypto/merkletrie/node.go	93.48% <0.00%> (+1.86%)	⬆️
crypto/merkletrie/trie.go	68.61% <0.00%> (+2.18%)	⬆️

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[bbroder-algo]

New tests that are now within the linter's scope for evaluation:

agreement/agreementtest/simulate_test.go
agreement/cryptoRequestContext_test.go
agreement/cryptoVerifier_test.go
agreement/fuzzer/catchupFilter_test.go
agreement/fuzzer/ledger_test.go
agreement/fuzzer/networkFacade_test.go
agreement/fuzzer/nodeCrashFilter_test.go
agreement/fuzzer/tests_test.go
agreement/gossip/networkFull_test.go
agreement/gossip/network_test.go
agreement/msgp_gen_test.go
agreement/pseudonode_test.go
catchup/ledgerFetcher_test.go
cmd/catchupsrv/download_test.go
cmd/goal/node_test.go
cmd/partitiontest_linter/linter_test.go
cmd/partitiontest_linter/testdata/linter_testdata_test.go
cmd/partitiontest_linter/testdata/linter_testdata_test.go
crypto/merklearray/msgp_gen_test.go
crypto/merklesignature/msgp_gen_test.go
crypto/merkletrie/node_test.go
crypto/msgp_gen_test.go
crypto/stateproof/builder_test.go
crypto/stateproof/coinGenerator_test.go
crypto/stateproof/committableSignatureSlot_test.go
crypto/stateproof/msgp_gen_test.go
crypto/stateproof/msgp_gen_test.go
crypto/stateproof/verifier_test.go
crypto/stateproof/weights_test.go
crypto/util_test.go
daemon/algod/api/server/v2/test/handlers_resources_test.go
daemon/algod/api/server/v2/test/handlers_test.go
daemon/algod/api/spec/v2/msgp_gen_test.go
data/account/msgp_gen_test.go
data/basics/msgp_gen_test.go
data/bookkeeping/genesis_test.go
data/bookkeeping/msgp_gen_test.go
data/committee/msgp_gen_test.go
data/hashable/msgp_gen_test.go
data/ledger_test.go
data/stateproofmsg/msgp_gen_test.go
data/stateproofmsg/msgp_gen_test.go
data/transactions/logic/ledger_test.go
data/transactions/msgp_gen_test.go
ledger/catchupaccessor_test.go
ledger/encoded/msgp_gen_test.go
ledger/ledgercore/accountdata_test.go
ledger/ledgercore/msgp_gen_test.go
ledger/msgp_gen_test.go
ledger/store/data_test.go
ledger/store/msgp_gen_test.go
ledger/testing/consensusRange_test.go
ledger/testing/randomAccounts_test.go
netdeploy/networkTemplates_test.go
netdeploy/network_test.go
node/msgp_gen_test.go
protocol/msgp_gen_test.go
protocol/test/msgp_gen_test.go
protocol/test/msgp_gen_test.go
rpcs/msgp_gen_test.go
stateproof/msgp_gen_test.go
test/commandandcontrol/cc_agent/component/agent_test.go
test/e2e-go/cli/goal/node_cleanup_test.go
test/e2e-go/features/catchup/basicCatchup_test.go
test/e2e-go/features/catchup/catchpointCatchup_test.go
test/e2e-go/features/stateproofs/stateproofs_test.go
test/e2e-go/upgrades/stateproof_participation_test.go
tools/network/dnssec/anchor_test.go
tools/network/dnssec/client_test.go
tools/network/dnssec/config_test.go
tools/network/dnssec/config_test.go
tools/network/dnssec/config_unix_test.go
tools/network/dnssec/config_unix_test.go
tools/network/dnssec/dnssec_test.go
tools/network/dnssec/sort_test.go
tools/network/dnssec/trustedchain_test.go
tools/network/dnssec/trustedzone_test.go
tools/network/dnssec/util_test.go
tools/network/dnssec/util_test.go
tools/network/resolveController_test.go
tools/network/resolver_test.go
tools/network/telemetryURIUpdateService_test.go