Include PathBase in the transaction name and details (#1771)

[TrueGoric]

This PR introduces automatic inclusion of PathBase in the transaction building process. The change is managed by a new configuration entry.

Closes #1771

[apmmachine]

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• Start Time: 2022-07-29T23:19:00.819+0000

• Duration: 3 min 25 sec

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Load a resource file from a shared library

• Took 0 min 0 sec . View more details here
• Description: approval-list/elastic/apm-agent-dotnet.yml

Error signal

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• Description: githubApiCall: The REST API call https://api.github.com/orgs/elastic/members/TrueGoric return the message : java.lang.Exception: httpRequest: Failure connecting to the service https://api.github.com/orgs/elastic/members/TrueGoric : httpRequest: Failure connecting to the service https://api.github.com/orgs/elastic/members/TrueGoric : Code: 404Error: {"message":"User does not exist or is not a member of the organization","documentation_url":"https://docs.github.com/rest/reference/orgs#check-organization-membership-for-a-user"}

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[gregkalapos]

This is blocked by open questions on https://github.com/elastic/apm-agent-dotnet/issues/1771 - closing it for now.