chore(individual-pkg-gen): strip redundant 'aws' from go package names (

#17097)

Currently, the published go alpha modules look like this:
`github.com/aws/aws-cdk-go/awscdkawsfoobaralpha/v2`

The redundant 'aws' in front of each service package name leads to a longer
package name than necessary, on an already long name. This change explicitly
sets the 'go' package name for each of the alpha modules, so they turn out like
this:
`github.com/aws/aws-cdk-go/awscdkfoobaralpha/v2`


----

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

tools/@aws-cdk/individual-pkg-gen/transform-packages.ts

@@ -175,9 +175,11 @@ function transformPackageJson(pkg: any, source: string, destination: string, alp
   jsiiTargets.python.distName += '-alpha';
   jsiiTargets.python.module += '_alpha';
   // Typically, only our top-level packages have a Go target.
-  // moduleName is needed; packageName will be automatically derived by from the package name.
+  // packageName has unusable chars and redundant 'aws' stripped.
+  // This generates names like 'awscdkfoobaralpha' (rather than 'awscdkawsfoobaralpha').
   jsiiTargets.go = {
     moduleName: 'github.com/aws/aws-cdk-go',
+    packageName: packageJson.name.replace('/aws-', '').replace(/[^a-z0-9.]/gi, '').toLowerCase(),
   };
 
   const finalPackageJson = transformPackageJsonDependencies(packageJson, pkg, alphaPackages);