[String interpolation] for literals (constants) the same as in C#

[xperiandri]

I propose we implement string interpolation for constants

The existing way of approaching this problem in F# is use string concatenation using +

Pros and Cons

The advantages of making this adjustment to F# are making string literals consisting of several other string literals to be more readable

**The disadvantages of making this adjustment to F# ** do not exist

Extra information

Estimated cost (XS, S, M, L, XL, XXL): probably S

Related suggestions:
C# discussion dotnet/csharplang#2077

Affidavit (please submit!)

Please tick these items by placing a cross in the box:

• This is not a question (e.g. like one you might ask on StackOverflow) and I have searched StackOverflow for discussions of this issue
• This is a language change and not purely a tooling change (e.g. compiler bug, editor support, warning/error messages, new warning, non-breaking optimisation) belonging to the compiler and tooling repository
• This is not something which has obviously "already been decided" in previous versions of F#. If you're questioning a fundamental design decision that has obviously already been taken (e.g. "Make F# untyped") then please don't submit it
• I have searched both open and closed suggestions on this site and believe this is not a duplicate

Please tick all that apply:

• This is not a breaking change to the F# language design
• I or my company would be willing to help implement and/or test this (I can try having links to relevant source code)

For Readers

If you would like to see this issue implemented, please click the 👍 emoji on this issue. These counts are used to generally order the suggestions by engagement.

[Happypig375]

If we fix #1306, we can also do constant interpolation of integers and floating point numbers.