(cherry picked from commit d574b03)

…otnet#55848)

.. and fix logging that broke recently.

`tasks/Common/Utils.cs`:

TaskLoggingHelper Utils.Logger is a static field, which must be set by
task else any methods in Utils, eg. RunProcess, silently fail to log
any messages. Also, this would be a problem when building multiple
projects in parallel, since the logger is a task-specific one.

Instead, we pass logger as an arg to all the methods.

(cherry picked from commit 3301e9d)

…net#55939)

(cherry picked from commit 04072ff)

* [wasm] Add back --emit-llvm that got removed mistakenly, in an earlier commit

.. found thanks to Jerome Laban.

* [wasm] Set EmccCompile's messages to MessageImportance.Low by default.

.. and to MessageImportance.Normal if `$(EmccVerbose)==true`.

* [wasm] Quote filenames passed to emcc compile command line

* Add more blazorwasm tests - for debug/release, aot/relinking

* Bump sdk for workload testing to 6.0.100-rc.1.21370.2

* [wasm] Fix regression in compiling bitcode -> .o

The `-emit-llvm` arg has been incorrectly added, and removed from the
args used for compiling .bc->.o .

This commit fixes it, and adds a crude test for it, so we don't regress
again.

* Fix build

(cherry picked from commit 1d8ad03)