bigtable: fix failing test `TestAccBigtableTable_familyType

[wyardley]

Update regex to match the current error message

Fixes hashicorp/terraform-provider-google#20001

I decided to lose the leading / trailing .*, which I think is redundant. Looks like since it's re2, the literal . doesn't need to be escaped.

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[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, 1 insertion(+), 1 deletion(-))
google-beta provider: Diff ( 1 file changed, 1 insertion(+), 1 deletion(-))

[ron-gal]

Sorry!

[modular-magician]

Tests analytics

Total tests: 49
Passed tests: 0
Skipped tests: 49
Affected tests: 0

Click here to see the affected service packages

• bigtable

🟢 All tests passed!

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[zli82016]

The test passed in Teamcity

[zli82016]

LGTM. Thanks for the fix.