[Storage] OOM in tests. Force 64bit architecture in tests.

[kasobol-msft]

Related to #20301

• added test to check if test process is 64bit
• forced architecture in test run via --runtime switch

[kasobol-msft]

/azp run net - storage - tests

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[benbp]

These two files will need to be updated too:
https://github.com/Azure/azure-sdk-for-net/blob/master/sdk/identity/platform-matrix.json
https://github.com/Azure/azure-sdk-for-net/blob/master/sdk/keyvault/platform-matrix.json

[pakrym]

LGTM, I'm very surprised by default local tests running 32bit.

[benbp]

Nit: newline here.

[benbp]

@pakrym yeah perhaps there's a higher level config or dotnet or OS setting that's making it use a 32-bit default here?

[benbp]

Also are we sure there are no other common, non-OS specific ways to tell either dotnet or nunit to run 64 bit (i.e. not via the command line, since apparently we don't have a general flag for that at least for --runtime).

[kasobol-msft]

Also are we sure there are no other common, non-OS specific ways to tell either dotnet or nunit to run 64 bit (i.e. not via the command line, since apparently we don't have a general flag for that at least for --runtime).

Been talking to @pakrym . We'll try this https://stackoverflow.com/questions/3155492/how-do-i-specify-the-platform-for-msbuild instead. seems to be promising so far.