make one of the source_ parameters required for ingress firewall

[megan07]

Fixes hashicorp/terraform-provider-google#2924

If this PR is for Terraform, I acknowledge that I have:

• Searched through the issue tracker for an open issue that this either resolves or contributes to, commented on it to claim it, and written "fixes {url}" or "part of {url}" in this PR description. If there were no relevant open issues, I opened one and commented that I would like to work on it (not necessary for very small changes).
• Generated Terraform, and ran make test and make lint to ensure it passes unit and linter tests.
• Ensured that all new fields I added that can be set by a user appear in at least one example (for generated resources) or third_party test (for handwritten resources or update tests).
• Ran relevant acceptance tests (If the acceptance tests do not yet pass or you are unable to run them, please let your reviewer know).
• Read the Release Notes Guide before writing my release note below.

Release Note Template for Downstream PRs (will be copied)

compute: required one of `source_tags`, `source_ranges` or `source_service_accounts` on INGRESS `google_compute_firewall` resources

[modular-magician]

Hi! I'm the modular magician. Your PR generated some diffs in downstreams - here they are.

Diff report:

Terraform GA: Diff ( 4 files changed, 38 insertions(+), 9 deletions(-))
Terraform Beta: Diff ( 5 files changed, 39 insertions(+), 10 deletions(-))
TF Conversion: Diff ( 1 file changed, 22 insertions(+))
TF Cloud Doc Samples: Diff ( 1 file changed, 2 insertions(+))

[modular-magician]

I have triggered VCR tests in RECORDING mode for the following tests that failed during VCR: TestAccComputeFirewall_firewallWithTargetTagsExample|TestAccComputeFirewall_noSource You can view the result here: https://ci-oss.hashicorp.engineering/viewQueued.html?itemId=208285

[modular-magician]

Tests failed during RECORDING mode: TestAccComputeFirewall_noSource Please fix these to complete your PR

[modular-magician]

Hi! I'm the modular magician. Your PR generated some diffs in downstreams - here they are.

Diff report:

Terraform GA: Diff ( 4 files changed, 38 insertions(+), 9 deletions(-))
Terraform Beta: Diff ( 4 files changed, 38 insertions(+), 9 deletions(-))
TF Conversion: Diff ( 1 file changed, 22 insertions(+))
TF Cloud Doc Samples: Diff ( 1 file changed, 2 insertions(+))

[modular-magician]

I have triggered VCR tests in RECORDING mode for the following tests that failed during VCR: TestAccContainerCluster_withAuthenticatorGroupsConfig You can view the result here: https://ci-oss.hashicorp.engineering/viewQueued.html?itemId=208313

[modular-magician]

Hi! I'm the modular magician. Your PR generated some diffs in downstreams - here they are.

Diff report:

Terraform GA: Diff ( 5 files changed, 44 insertions(+), 9 deletions(-))
Terraform Beta: Diff ( 5 files changed, 44 insertions(+), 9 deletions(-))
TF Conversion: Diff ( 1 file changed, 22 insertions(+))
TF Cloud Doc Samples: Diff ( 1 file changed, 2 insertions(+))

[modular-magician]

I have triggered VCR tests in RECORDING mode for the following tests that failed during VCR: TestAccDatasourceGoogleServiceNetworkingPeeredDnsDomain_basic|TestAccServiceNetworkingPeeredDNSDomain_basic You can view the result here: https://ci-oss.hashicorp.engineering/viewQueued.html?itemId=208967

[modular-magician]

Hi! I'm the modular magician. Your PR generated some diffs in downstreams - here they are.

Diff report:

Terraform GA: Diff ( 5 files changed, 47 insertions(+), 10 deletions(-))
Terraform Beta: Diff ( 7 files changed, 50 insertions(+), 12 deletions(-))
TF Conversion: Diff ( 1 file changed, 22 insertions(+))
TF Validator: Diff ( 1 file changed, 22 insertions(+))
TF Cloud Doc Samples: Diff ( 1 file changed, 2 insertions(+))

[modular-magician]

I have triggered VCR tests in RECORDING mode for the following tests that failed during VCR: TestAccDatasourceGoogleServiceNetworkingPeeredDnsDomain_basic|TestAccSqlUser_postgresIAM You can view the result here: https://ci-oss.hashicorp.engineering/viewQueued.html?itemId=211863

[modular-magician]

Tests failed during RECORDING mode: TestAccSqlUser_postgresIAM Please fix these to complete your PR