Add * as default value for 3 more native connectors

[artem-shelkovnikov]

Summary

This PR adds "*" as default value for 3 more native connector fields that specify comma-separate values:

• MySQL connector field "tables"
• Oracle connector field "tables"
• Sharepoint Online field "site_collections"

Similar PR in connectors: https://github.com/elastic/connectors/pull/2532

For maintainers

• [ ] This was checked for breaking API changes and was labeled appropriately

[kibana-ci]

:green_heart: Build Succeeded

• Buildkite Build
• Commit: 3a161140076f042d17d6e5d3f40520da10d16aaa

Metrics [docs]

Async chunks

Total size of all lazy-loaded chunks that will be downloaded as the user navigates the app

id	before	after	diff
enterpriseSearch	2.7MB	2.7MB	+3.0B

To update your PR or re-run it, just comment with: @elasticmachine merge upstream

[kibanamachine]

💚 All backports created successfully

Status	Branch	Result
✅	8.14

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