Fix failing TestAccDataflowJob tests.

[damondouglas]

This PR fixes hashicorp/terraform-provider-google#18074 largely changing the use of the Projects.Jobs.Get to the recommended Projects.Locations.Jobs.Get which is based on the regional endpoints.

[github-actions]

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[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.

google provider: Diff ( 1 file changed, 208 insertions(+), 155 deletions(-))
google-beta provider: Diff ( 1 file changed, 208 insertions(+), 155 deletions(-))

[modular-magician]

Tests analytics

Total tests: 25
Passed tests: 0
Skipped tests: 25
Affected tests: 0

Click here to see the affected service packages

• dataflow

🟢 All tests passed!

View the build log

[shuyama1]

Triggered tests that skipped in VCR on TC. I'll update test result here after they're done

[github-actions]

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