feat: add new sample for analytics data (run_report with aggregations)

[anweshan]

Adds sample for analytics data v1beta run_report with aggregations

[snippet-bot[bot]]

Here is the summary of changes.

You are about to add 4 region tags.

• analyticsdata/src/run_report_with_aggregations.php:30, tag analyticsdata_run_report_with_aggregations
• analyticsdata/src/run_report_with_aggregations.php:46, tag analyticsdata_initialize
• analyticsdata/src/run_report_with_aggregations.php:78, tag analyticsdata_print_run_report_response_header
• analyticsdata/src/run_report_with_aggregations.php:92, tag analyticsdata_print_run_report_response_rows

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[anweshan]

@bshaffer the changes were made