Revert "Bump hashbrown from 0.11.2 to 0.12.0 (#7730)" (#7755)

Hashbrown 0.12.0 bumped the MSRV (minimum support rust version) to
1.56.1 which was released on November 2021. This is causing some issues
for people building locally as that is a pretty new version of rust.
While we don't set an MSRV for terra, I think we should try to at least
support that past ~6 months of Rust releases for building just to give
people time to upgrade and not require everyone to use rustup.

As there was nothing critical in hashbrown 0.12.0 this commit just
reverts back to 0.11.2 for now. We can look at bumping that after the
0.20.0 release.

This reverts commit d05931dbfa.

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

Cargo.lock

@@ -94,9 +94,9 @@ dependencies = [
 
 [[package]]
 name = "hashbrown"
-version = "0.12.0"
+version = "0.11.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8c21d40587b92fa6a6c6e3c1bdbf87d75511db5672f9c93175574b3a00df1758"
+checksum = "ab5ef0d4909ef3724cc8cce6ccc8572c5c817592e9285f5464f8e86f8bd3726e"
 dependencies = [
  "ahash",
  "rayon",

Cargo.toml

@@ -25,7 +25,7 @@ version = "^0.15.0"
 features = ["rayon"]
 
 [dependencies.hashbrown]
-version = "0.12.0"
+version = "0.11.2"
 features = ["rayon"]
 
 [profile.release]