C#: Provide skeleton to generate an assemblyInfo file.

Each unit gets a unique assemblyInfo file, on top
of the ones for entrypoints that also gets the git info embedded.

misc/bazel/csharp.bzl

@@ -4,10 +4,25 @@ load("//misc/bazel:pkg.bzl", "codeql_pkg_files")
 
 TARGET_FRAMEWORK = "net8.0"
 
+def _gen_assembly_info(name):
+    assembly_info_gen = name + "-assembly-info"
+
+    native.genrule(
+        name = assembly_info_gen,
+        outs = [name + "AssemblyInfo.cs"],
+        cmd = "$(execpath //csharp/scripts:gen-assembly-info) $@ " + name,
+        tools = ["//csharp/scripts:gen-assembly-info"],
+    )
+    return ":" + assembly_info_gen
+
 def codeql_csharp_library(name, **kwargs):
+    assembly_info_gen = _gen_assembly_info(name)
+    srcs = kwargs.pop("srcs", [])
+    srcs.append(assembly_info_gen)
+
     kwargs.setdefault("nullable", "enable")
     kwargs.setdefault("target_frameworks", [TARGET_FRAMEWORK])
-    csharp_library(name = name, **kwargs)
+    csharp_library(name = name, srcs = srcs, **kwargs)
 
 def codeql_xunit_test(name, **kwargs):
     kwargs.setdefault("nullable", "enable")
@@ -40,8 +55,11 @@ def codeql_csharp_binary(name, **kwargs):
     resources = kwargs.pop("resources", [])
     srcs = kwargs.pop("srcs", [])
 
+    assembly_info_gen = _gen_assembly_info(name)
+    srcs.append(assembly_info_gen)
+
     # always add the assembly info file that sets the AssemblyInformationalVersion attribute to the extractor version
-    srcs.append("//csharp/scripts:assembly-info-src")
+    srcs.append("//csharp/scripts:git-assembly-info-src")
 
     csharp_binary_target = "bin/" + name
     publish_binary_target = "publish/" + name