Port `-nobl` and `net5.0` changes from 'master'

* Update dependencies from https://github.com/dotnet/arcade

 build 20200511.9
  - Microsoft.DotNet.Arcade.Sdk: 5.0.0-beta.20228.4 => 5.0.0-beta.20261.9
  - Microsoft.DotNet.GenAPI: 5.0.0-beta.20228.4 => 5.0.0-beta.20261.9
  - Microsoft.DotNet.Helix.Sdk: 5.0.0-beta.20228.4 => 5.0.0-beta.20261.9

* Pre-emptively take -nobl change

* Disable binlogs in CI

* Fix build.sh to know about -nobl

* Align build.ps1|sh with latest Arcade parameters
  - do not enable binary logs by default in CI builds
  - leave `-binaryLog` and `-excludeCIBinaryLog` handling to eng/common/tools.ps1|sh
    - was unnecessary since `-bl /bl:{some name}` worked fine, ignoring OOMs

nit: document `-excludeCIBinarylog` a bit more

* Do not pass unknown options into CodeCheck.ps1

* Pass `-ci -nobl` into remaining CI build jobs

* Switch default TFM to `net5.0`

* Update missing project templates tfms

* Add more `-ci -nobl`
  - needed because _all_ builds in the pipeline are implicitly CI builds
    - default-build.yml adds `-ci` when script wasn't explicit

* Default templates to net5.0

* PR feedback

* Update TFMs in explicit .nuspec files

* Update TFMs in test projects

* Update TFMs in test C# code

* Update TFMs in infrastructure files

* Future-proof a check for `net5.0` or later
  - avoid comparisons involving `$(TargetFramework)` in .targets files
    - fine to compare it with `''` or `$(DefaultNetCoreTargetFramework)`

* !fixup! Undo a couple of earlier fixes
  - remove a duplicate `$()` setting
  - correct the one remaining versioned `#if` define
    - did not make it `#if NETCOREAPP` because benchmarks test numerous .NET Core TFMs

* Disable binary logs in CodeCheck.ps1

* Specify `-ci -nobl` just once when using `parameters.buildArgs`

* Restore `$binaryLog` default logic

This cherry-picks most of d5849f35 into this branch
- [master] Update dependencies from dotnet/arcade dotnet/aspnetcore-tooling (#21630)
- does not include dotnet/aspnetcore-tooling updates

Co-authored-by: dotnet-maestro[bot] <42748379+dotnet-maestro[bot]@users.noreply.github.com>
Co-authored-by: Will Godbe <wigodbe@microsoft.com>
Co-authored-by: Viktor Hofer <viktor.hofer@microsoft.com>