[profile] Add profile_name attribute to Jinja context

[uilianries]

Add the profile_name based on the original need, creating a generic profile that uses its own file name to define its settings.

Related to conan-io/conan#13721

[uilianries]

@memsharded I needed to update the parse, as it will include .jinja as part of the profile_name and need to exclude it for parsing the profile settings. Otherwise, the compiler.version would be 12.jinja

[memsharded]

This cannot be merged, because it goes to release/2.0, but belongs to a feature not yet released (2.0.5), so we need to wait for merge (or please target the PR to develop2 instead)

[uilianries]

@memsharded fixed the base branch to develop2. Of course, I needed to use forced push to correct the base. Please, review it again.