Allow google_monitoring_notification_channel import process to set project from the URI

[SarahFrench]

Fixes hashicorp/terraform-provider-google#10788

This PR makes the import logic for the google_monitoring_notification_channel resource pull the project value out of the URI. This allows people to import the resource when there are no default project values present on the provider.

Release Note Template for Downstream PRs (will be copied)

monitoring: fixed bug where importing `google_monitoring_notification_channel` failed when no default project was supplied in provider configuration or through environment variables

[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 ( 1 file changed, 13 insertions(+), 1 deletion(-))
Terraform Beta: Diff ( 1 file changed, 13 insertions(+), 1 deletion(-))

[modular-magician]

Tests analytics

Total tests: 3075
Passed tests 2775
Skipped tests: 299
Affected tests: 1

Action taken

Found 1 affected test(s) by replaying old test recordings. Starting RECORDING based on the most recent commit. Click here to see the affected tests

TestAccSpannerDatabaseIamPolicy

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[modular-magician]

$\textcolor{green}{\textsf{Tests passed during RECORDING mode:}}$
TestAccSpannerDatabaseIamPolicy[Debug log]

Rerun these tests in REPLAYING mode to catch issues

$\textcolor{green}{\textsf{No issues found for passed tests after REPLAYING rerun.}}$

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$\textcolor{green}{\textsf{All tests passed!}}$
View the build log or the debug log for each test

[SarahFrench]

Thanks for the speedy review Hao!