Add support for network_firewall_policy_association and region_network_firewall_policy_association

[ghabian]

This PR adds support for the network_firewall_policy_association resource, and its regional counterpart (region_network_firewall_policy_association). These resources have been integrated into the DCL already and requires DCL v1.26 .

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)

`google_compute_network_firewall_policy_association`

`google_compute_region_network_firewall_policy_association`

[modular-magician]

Hi there, I'm the Modular magician. I've detected the following information about your changes:

Diff report

Your PR generated some diffs in downstreams - here they are.

Terraform GA: Diff ( 7 files changed, 1049 insertions(+), 31 deletions(-))
Terraform Beta: Diff ( 7 files changed, 1051 insertions(+), 33 deletions(-))
TF Validator: Diff ( 2 files changed, 3 insertions(+), 3 deletions(-))

[modular-magician]

Tests analytics

Total tests: 2228
Passed tests 1985
Skipped tests: 240
Failed tests: 3

Action taken

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

TestAccComputeRegionNetworkFirewallPolicyAssociation_RegionalHandWritten|TestAccComputeNetworkFirewallPolicyAssociation_GlobalHandWritten|TestAccFirebaserulesRelease_BasicRelease

[modular-magician]

Tests passed during RECORDING mode:
TestAccComputeRegionNetworkFirewallPolicyAssociation_RegionalHandWritten[Debug log]
TestAccComputeNetworkFirewallPolicyAssociation_GlobalHandWritten[Debug log]
TestAccFirebaserulesRelease_BasicRelease[Debug log]

All tests passed
View the build log or the debug log for each test

[rileykarson]

One comment about the id/import format, let's use a synthetic one over the format of the GET URL. That's consistent with other similar resources (we call this pattern "fine-grained resources"), particularly the FirewallPolicy suite of 'em.

Also left some newline suggestions, but that's just nitpicking. Feel free to make 'em in GitHub or locally. They're non-blocking.

[modular-magician]

Hi there, I'm the Modular magician. I've detected the following information about your changes:

Diff report

Your PR generated some diffs in downstreams - here they are.

Terraform GA: Diff ( 7 files changed, 1057 insertions(+), 31 deletions(-))
Terraform Beta: Diff ( 7 files changed, 1059 insertions(+), 33 deletions(-))
TF Validator: Diff ( 2 files changed, 3 insertions(+), 3 deletions(-))

[modular-magician]

Tests analytics

Total tests: 2230
Passed tests 1985
Skipped tests: 241
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

TestAccDataLossPreventionJobTrigger_dlpJobTriggerBasicExample|TestAccComputeNetworkFirewallPolicyAssociation_GlobalHandWritten|TestAccComputeRegionNetworkFirewallPolicyAssociation_RegionalHandWritten|TestAccComputeForwardingRule_update

[modular-magician]

Tests passed during RECORDING mode:
TestAccDataLossPreventionJobTrigger_dlpJobTriggerBasicExample[Debug log]
TestAccComputeForwardingRule_update[Debug log]

Tests failed during RECORDING mode:
TestAccComputeNetworkFirewallPolicyAssociation_GlobalHandWritten[Error message] [Debug log]
TestAccComputeRegionNetworkFirewallPolicyAssociation_RegionalHandWritten[Error message] [Debug log]

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

[modular-magician]

Hi there, I'm the Modular magician. I've detected the following information about your changes:

Diff report

Your PR generated some diffs in downstreams - here they are.

Terraform GA: Diff ( 7 files changed, 1057 insertions(+), 31 deletions(-))
Terraform Beta: Diff ( 7 files changed, 1059 insertions(+), 33 deletions(-))
TF Validator: Diff ( 2 files changed, 3 insertions(+), 3 deletions(-))

[modular-magician]

Tests analytics

Total tests: 2237
Passed tests 1994
Skipped tests: 241
Failed tests: 2

Action taken

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

TestAccDataLossPreventionJobTrigger_dlpJobTriggerBasicExample|TestAccComputeForwardingRule_update

[modular-magician]

Tests passed during RECORDING mode:
TestAccDataLossPreventionJobTrigger_dlpJobTriggerBasicExample[Debug log]
TestAccComputeForwardingRule_update[Debug log]

All tests passed
View the build log or the debug log for each test

[ghabian]

all set now @rileykarson ?

[rileykarson]

LGTM, thanks!