Suggest wrapping patterns in enum variants

[compiler-errors]

Structured suggestion to wrap a pattern in a single-field enum or struct:

 struct A;

 enum B {
   A(A),
 }

 fn main(b: B) {
   match b {
-    A => {}
+    B::A(A) => {}
   }
 }

Half of #94942, the other half I'm not exactly sure how to fix.

Also includes two drive-by changes (that I am open to splitting out into another PR, but thought they could be rolled up into this one):

• 07776c1: Makes sure not to suggest wrapping if it doesn't have tuple field constructor (i.e. has named fields)
• 8f2bbb18fd53e5008bb488302dbd354577698ede: Also suggest wrapping expressions in a tuple struct (not just enum variants)

[rust-highfive]

r? @oli-obk

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[oli-obk]

nice!

@bors r+ rollup

[bors]

📌 Commit fc289a0 has been approved by oli-obk