Added CMEK support for cloud data fusion

[niranjankl]

fixes hashicorp/terraform-provider-google#10536

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)

datafusion: added `crypto_key_config` field to `google_data_fusion_instance` resource

[modular-magician]

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[modular-magician]

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

Diff report:

Terraform GA: Diff ( 3 files changed, 181 insertions(+))
Terraform Beta: Diff ( 3 files changed, 181 insertions(+))
TF Validator: Diff ( 3 files changed, 32 insertions(+), 3 deletions(-))
TF OiCS: Diff ( 4 files changed, 133 insertions(+))

[modular-magician]

Tests analytics

Total tests: 2207
Passed tests 1963
Skipped tests: 240
Failed tests: 4

Action taken

Triggering VCR tests in RECORDING mode for the tests that failed during VCR. Click here to see the failed tests

TestAccFirebaserulesRelease_BasicRelease|TestAccComputeInstance_soleTenantNodeAffinities|TestAccDataFusionInstance_dataFusionInstanceCmekExample|TestAccCGCSnippet_eventarcWorkflowsExample

[modular-magician]

Tests passed during RECORDING mode:
TestAccFirebaserulesRelease_BasicRelease[Debug log]
TestAccDataFusionInstance_dataFusionInstanceCmekExample[Debug log]

Tests failed during RECORDING mode:
TestAccComputeInstance_soleTenantNodeAffinities[Error message] [Debug log]
TestAccCGCSnippet_eventarcWorkflowsExample[Error message] [Debug log]

Please fix these to complete your PR
View the build log or the debug log for each test

[slevenick]

Looks good, thanks!