Revert "Remove unnecessary ‘rustfmt’ symlink"

Revert "Make `rustfmt` available for other modules"

Revert submission 2079623-pdl-rustfmt

Reason for revert: b/232531894 - broken build
Reverted Changes:
Icba16d7a5:Remove unnecessary ‘rustfmt’ symlink
I4d08a8fd7:Make `rustfmt` available for other modules
(cherry picked from https://android-review.googlesource.com/q/commit:48ca2017854c8fb5489e6e9e73e0d0ade8c4eb4d)
Merged-In: I6103cf5db4899537e116964ea3dae17c197da6df
Change-Id: I6103cf5db4899537e116964ea3dae17c197da6df
Test: atest pdl_tests
Tag: #feature
Bug: 237977382