Update Dapr Bindings Quickstart - .NET

[WhitWaldo]

Description

Dapr package version bump to 1.15.0-rc02. Tweaked program to favor DI registration over the static client builder.

Issue reference

N/A - part of 1.15 endgame

Checklist

Please make sure you've completed the relevant tasks for this PR, out of the following list:

• The quickstart code compiles correctly
• You've tested new builds of the quickstart if you changed quickstart code
• You've updated the quickstart's README if necessary
• If you have changed the steps for a quickstart be sure that you have updated the automated validation accordingly. All of our quickstarts have annotations that allow them to be executed automatically as code. For more information see mechanical-markdown. For user guide with examples see Examples.

[paulyuk]

Hey @WhitWaldo - thanks a lot. Agree DI is nice improvement. Please see comment. Also could you please sync to release-1.15 branch now that #1141 is in? I expect all tests to pass except for Python. See that PR for details.

[WhitWaldo]

Hey @WhitWaldo - thanks a lot. Agree DI is nice improvement. Please see comment. Also could you please sync to release-1.15 branch now that #1141 is in? I expect all tests to pass except for Python. See that PR for details.

@paulyuk I'm still showing that by merging to release-1.15, it's going to add #1093 to my commits which isn't related to my PR.

Might we instead create a "release-1.15-dotnet" branch on this repo that I can merge all my changes to and when I'm done, that can be merged wherever ya'll want it?