…ues that weren't causing issues in .net6. Also removed "ISystemClock" from authenticationhandlers as it is deprecated in .net8. Internally .net8 provides replacement so only change on our part was removing the param. all references to headerdictionary use trygetvalue and check that result count is 1 to make sure user didn't supply >1 role. when that is fulfilled , the stringvalues object is converted to string and the nullable error goes away.

Add framework dependent constructors for EasyAuth/SimulatorAuthenticationHandlers. Directory.Packages.Props now has framework dependent section to define separate package versions.

…s from main

…aimtypes aren't used. (dotnet8 change, but this test modification is backwards compatible per successful "net6 tests".)

update usings
update notice file generation with latest sqlclient version
behind scenes updated nuget dependency versions in our upstream feed. updating build pipeline comments. added mitigating helper function that is backwards compatible with net6 so that we don't get unhandled json exception that halts startup.
revert accidental nuget feed change.

Ignore seralize/deserialize unit test due to attempting to serialize when latest .net guidance says not to. Attached github discussion link from dotnet/runtime.

…ta-api-builder into dev/sean/dotnet8upgrade

…nstall to dwsql/mssql windows pipelines. Not just linux.

…nd net8 config files in test project.

…ction string in configs in both net6 and net8 folders.

…and net8.0 target frameworks explicitly and then optionally zip all the output.

Updated create-manifest-file to accommodate the net8 and net6 multitarget builds.

…t to preserve running on .net6 and apply fix to running on .net8 by removing object converter. After testing , this still works but a better solution may exist. moved Microsoft.Extensions.Configuration.Json/Binder to targetframework specific directory.packages.props section to align dependency versions with dotnetruntime versions. this helped ensure .net6 version of serializationdeserialization test to pass on both runtimes.