Added member output only field in service account resource and multiple service account datasources

[AlfatahB]

Added member output only field in service account resource and multiple service account datasources.
fixes hashicorp/terraform-provider-google#12193

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)

appengine: added `member` field to `google_app_engine_default_service_account` datasource

bigquery: added `member` field to `google_bigquery_default_service_account` datasource

storage: added `member` field to `google_storage_project_service_account` and `google_storage_transfer_project_service_account` datasource

serviceaccount: added `member` field to `google_service_account` resource and datasource

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[modular-magician]

Hi there, I'm the Modular magician. I've sorted out the following information about your changes, here it is - !

Diff report

Terraform GA: Diff ( 18 files changed, 65 insertions(+))
Terraform Beta: Diff ( 18 files changed, 65 insertions(+))
TF Validator: Diff ( 2 files changed, 3 insertions(+), 3 deletions(-))

[modular-magician]

Tests analytics

Total tests: 2198
Passed tests 1954
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|TestAccBigtableAppProfile_bigtableAppProfileAnyclusterExample|TestAccCGCSnippet_eventarcWorkflowsExample

[modular-magician]

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

[AlfatahB]

As the member attribute is an output-only field, I have kept it as computed. Also, the value of the member attribute is dependent on the email attribute which is also a computed field. Hence, its value will be known only after terraform apply.

[mitj04]

LGTM

[shuyama1]

/gcbrun

[modular-magician]

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

Diff report:

Terraform GA: Diff ( 18 files changed, 65 insertions(+))
Terraform Beta: Diff ( 18 files changed, 65 insertions(+))
TF Validator: Diff ( 2 files changed, 3 insertions(+), 3 deletions(-))

[modular-magician]

Tests analytics

Total tests: 2216
Passed tests 1974
Skipped tests: 240
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

TestAccComputeInstance_soleTenantNodeAffinities|TestAccCGCSnippet_eventarcWorkflowsExample

[modular-magician]

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