Split JIT.CodeGenBringUpTests to fix Alpine runs (#114376)

Alpine is having problems with not enough file handles.

Author: BruceForstall

src/tests/JIT/CodeGenBringUpTests/JIT.CodeGenBringUpTests.csproj

@@ -0,0 +1,8 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <ItemGroup>
+    <MergedWrapperProjectReference Include="**/*_d.??proj" />
+    <MergedWrapperProjectReference Remove="JIT.CodeGenBringUpTests_*.csproj" />
+  </ItemGroup>
+
+  <Import Project="$(TestSourceDir)MergedTestRunner.targets" />
+</Project>

src/tests/JIT/CodeGenBringUpTests/JIT.CodeGenBringUpTests_d.csproj

@@ -0,0 +1,8 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <ItemGroup>
+    <MergedWrapperProjectReference Include="**/*_do.??proj" />
+    <MergedWrapperProjectReference Remove="JIT.CodeGenBringUpTests_*.csproj" />
+  </ItemGroup>
+
+  <Import Project="$(TestSourceDir)MergedTestRunner.targets" />
+</Project>

src/tests/JIT/CodeGenBringUpTests/JIT.CodeGenBringUpTests_do.csproj

@@ -0,0 +1,13 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <ItemGroup>
+    <!-- This should use `*_r.??proj`, but we use a more general regex to pick up everything
+         not already picked up by the other .csproj files -->
+    <MergedWrapperProjectReference Include="**/*.??proj" />
+    <MergedWrapperProjectReference Remove="**/*_ro.??proj" />
+    <MergedWrapperProjectReference Remove="**/*_d.??proj" />
+    <MergedWrapperProjectReference Remove="**/*_do.??proj" />
+    <MergedWrapperProjectReference Remove="JIT.CodeGenBringUpTests_*.csproj" />
+  </ItemGroup>
+
+  <Import Project="$(TestSourceDir)MergedTestRunner.targets" />
+</Project>

src/tests/JIT/CodeGenBringUpTests/JIT.CodeGenBringUpTests_r.csproj

@@ -0,0 +1,8 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <ItemGroup>
+    <MergedWrapperProjectReference Include="**/*_ro.??proj" />
+    <MergedWrapperProjectReference Remove="JIT.CodeGenBringUpTests_*.csproj" />
+  </ItemGroup>
+
+  <Import Project="$(TestSourceDir)MergedTestRunner.targets" />
+</Project>