Profile Selection Redesign

[ScottCarda-MS]

Reintroduces the profile selection feature with an updated design. This PR:

• Removes global setting for target profile.
• Removes the status bar selection for target profile.
• Removes the Playground selection for target profile.
• Adds an optional field to qsharp.json, "target_profile" where the target profile can be set for Q# projects.
• Adds an optional argument to the EntryPoint attribute where the target profile can be set for non-project Q# files.
• Adds an optional pragma to set target profile for QASM files.
• Adds an error that will highlight the EntryPoint attribute if one occurs in a Q# project.
• Adds logic to assume the target profile based on the target's capabilities when no target profile is specified.

[idavis]

Approved openqasm related changes.