kernel-mshv and kernel-uvm: upgrade to 6.18- #18997

[Saul Paredes (Redent0r)]

Upgrade:

• kernel-mshv to https://github.com/microsoft/CBL-Mariner-Linux-Kernel/releases/tag/rolling-lts%2Fkata%2F6.18.34.mshv3
• kernel-uvm to https://github.com/microsoft/CBL-Mariner-Linux-Kernel/releases/tag/rolling-lts%2Fkata-uvm%2F6.18.52.mshv1

bb: https://dev.azure.com/mariner-org/mariner/_build/results?buildId=1214699&view=results
image build: https://dev.azure.com/mariner-org/mariner/_build/results?buildId=1214881&view=results
conformance:

• katav2 (w restore-annotation-stamped and vm-template-relaxed-overhead): https://dev.azure.com/mariner-org/mariner/_build/results?buildId=1216031&view=ms.vss-test-web.build-test-results-tab&runId=755175&resultId=100028&paneView=debug (known failures)
• kata: https://dev.azure.com/mariner-org/mariner/_build/results?buildId=1215228&view=ms.vss-test-web.build-test-results-tab (passing)
• runc: https://dev.azure.com/mariner-org/mariner/_build/results?buildId=1215510&view=ms.vss-test-web.build-test-results-tab (3 failures, need to look into)
  performance: https://dev.azure.com/mariner-org/mariner/_build/results?buildId=1216626&view=results

[Saul Paredes (Redent0r)]

closing in favor of #19088 (has interrupt patch and a few more config changes)