fix Issue 11793 - [ICE] Compiler runs out of memory with trivial program: class with own class member instance
fix Issue 11767 - doubly mixed-in struct "failed semantic analysis"

Inherently this is a mangling issue, which had been hidden since 2a3db5d7afd0c26e8a0ec58ff6fb6a8cd9647de6, and then detected by [the assertion for AST sanity](20fe5e8600498fed322a7d5d8305acb2de852cde).

Each mixed-in symbols are in independent scope, and their mangled names should also be different.
To fix the issue, assign scope-local unique name for each unnamed `TemplateMixin`s, as same as lambdas.
Merge pull request #3019 from 9rnsr/fix11767

[REG2.060] Issue 11767 - doubly mixed-in struct "failed semantic analysis"
Merge pull request #3013 from 9rnsr/fix11793

Issue 11793 - [ICE] Compiler runs out of memory with trivial program: class with own class member instance
Add factory function for TypeTuple
Use factory functions instead of calling constructors from the glue layer
Use factory functions to create arrays from the glue layer