[bug] intel functions exposed under tools without prefix

[solvingj]

Starting with Conan version 1.30.0, the following existing intel-related functions are made public use inside conanfile.py.

• tools.compilervars()
• tools.compilervars_dict()
• tools.compilervars_command()

Physically, these functions live in the conans.client.tools.intel package, but are "exposed' to conanfile.py under the tools package:
from tools import compilervars

Unfortunately, exposing them directly under the tools package makes the function names ambiguous. For clarity, these function should be renamed to begin with the prefix of intel_.

Environment Details (include every applicable attribute)

• Operating System+version: All
• Compiler+version: Intel all
• Conan version: 1.30.0
• Python version: All

[memsharded]

Closed by #7821