Stop sending external data configuration schema when updating google_bigquery_table

[wj-chen]

Fixes hashicorp/terraform-provider-google#19177.

Release Note Template for Downstream PRs (will be copied)

bigquery: fixed bug of sending both `schema` and `external_data_configuration.schema` when updating `google_bigquery_table`

[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 ( 2 files changed, 23 insertions(+), 5 deletions(-))
google-beta provider: Diff ( 2 files changed, 23 insertions(+), 5 deletions(-))

[modular-magician]

Tests analytics

Total tests: 119
Passed tests: 108
Skipped tests: 10
Affected tests: 1

Click here to see the affected service packages

• bigquery

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

• TestAccBigQueryTable_HivePartitioningCustomSchema_update

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[modular-magician]

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

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

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$\textcolor{green}{\textsf{All tests passed!}}$

View the build log or the debug log for each test

[BBBmau]

looks good, thanks for fixing this!