[DRAFT] Remove etc odbc deprecated module

[Dany12LU]

Experimental removal to see what breaks

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[dkorpel]

Looks like nothing on buildkite breaks (the Azure OMF failure is unrelated), but the deprecation comment says to wait until version 2.106

[LightBender]

Please do not merge this. This PR is based on an incorrect premise.

The etc.d.odbc.* modules should not be deprecated, and conversely, there should not have ever been core.sys.windows.sql* modules, those should be deprecated instead.

ODBC is not a Windows specific system. Both MacOS and Linux fully support ODBC and all major DB vendors support ODBC on all three platforms. MySql/PGSQL/MSSQL/Oracle, all maintain supported ODBC drivers for the above platforms, even cloud DB's such as Amazon Redshift maintain supported ODBC drivers for all three systems. And in some cases, as with MSSQL, ODBC is the only way to access the database on Linux. I currently have a non-public project that uses ODBC on Linux to access MSSQL.

Additionally, database drivers of any kind do not belong in DRT as they are not germane to the runtime of every D app.

[LightBender]

Resurrecting this. I have posted two new PRs. The first PR deprecates ODBC in DRT. The second puts ODBC back into Phobos and updates it to support non-Windows systems.
DRT: dlang/dmd#15560
Phobos: #8804

[LightBender]

@Dany12LU The above two referenced PRs have been merged. This PR has been superseded and can be removed.