Make Google Drive ftest use shared fixture

[artem-shelkovnikov]

Part of https://github.com/elastic/enterprise-search-team/issues/3397

This PR changes the fixture for the respected content source to make use of shared test setup using WeightedFakeProvider class.

This class takes care of generating large fake data with certain distribution, for example:

# In 65% cases generate small files
# In 20% cases generate medium size files
# In 10% cases generate large files
# in 5% cases generate huge files
fake_provider = WeightedFakeProvider(weights=[0.65, 0.2, 0.1, 0.05])

fake_provider.get_html() # <---- gets HTML of size depending on distribution
fake_provider.get_text() # <---- gets text of size depending on distribution

# Important difference
# get_text() returns huge amount of text that can be ingested, for example 2MB payload
# get_html() returns a huge payload that has too little text, for example for 2MB html it's around 1KB of text to text download/subextraction of rich content better

The final goal of the PR is to have more comparable benchmarks in our nightly functional tests of the amount of memory or cpu that is needed to run the connector.

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• this PR has a meaningful title
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Related Pull Requests

• Make Azure Blob Storage ftest use shared setup #1709
• Make Dropbox ftest use shared fixture #1710
• Make Github ftest use shared fixture #1717
• Make GCS ftest use shared fixture #1718
• Make Jira ftest use shared fixture setup #1720
• Make Microsoft Teams ftest use shared fixture #1725
• Make MSSQL ftest use shared fixture + small fixture optimizations #1726
• Make Network Drive ftest use shared fixture #1734
• Make MySQL ftest use shared fixture #1735
• Make OneDrive ftest use shared fixture #1736
• Make Oracle ftest use shared fixture #1744
• Make PostgreSQL ftest use shared fixture #1745
• Make S3 ftest use shared fixture #1754
• Make Salesforce ftest use shared fixture #1755
• Make Sharepoint Online ftest use shared fixture #1756
• Make Sharepoint Server ftest use shared fixture #1763
• Make Zoom ftest use shared fixture #1764

[github-actions]

💚 Backport PR(s) successfully created

Status	Branch	Result
✅	8.11	#1794

This backport PR will be merged automatically after passing CI.