Add GitHub runner architecture to CI cache key (#1110)

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## Description of change

This change adds the architecture of the runner to the cache key. In a
previous change where we upgraded macOS runners from macOS 12 to macOS
15, the architecture changed however the cache was not invalidated.

Likely we should find a way to key the cache on the actual operating
system version used however there doesn't seem to be an obvious way to
do that right now. This quick fix should at least protect us from
architecture changes (which macOS runners do have, but I understand its
only for larger runners at this time).

Relevant issues: #1097

## Does this change impact existing behavior?

No, only CI change.

## Does this change need a changelog entry in any of the crates?

No, only CI change.

---

By submitting this pull request, I confirm that my contribution is made
under the terms of the Apache 2.0 license and I agree to the terms of
the [Developer Certificate of Origin
(DCO)](https://developercertificate.org/).

Signed-off-by: Daniel Carl Jones <[email protected]>

.github/workflows/tests.yml

@@ -46,7 +46,7 @@ jobs:
           ~/.cargo/registry/cache/
           ~/.cargo/git/db/
           target/
-        key: ${{ runner.os }}-${{ github.job }}-fuse${{ matrix.fuseVersion }}-cargo-${{ hashFiles('**/Cargo.lock') }}
+        key: ${{ runner.os }}-${{ runner.arch }}-${{ github.job }}-fuse${{ matrix.fuseVersion }}-cargo-${{ hashFiles('**/Cargo.lock') }}
     - name: Build tests
       run: cargo test --features $RUST_FEATURES --no-run
     - name: Run tests
@@ -85,7 +85,7 @@ jobs:
           ~/.cargo/registry/cache/
           ~/.cargo/git/db/
           target/
-        key: ${{ runner.os }}-${{ github.job }}-cargo-${{ hashFiles('**/Cargo.lock') }}
+        key: ${{ runner.os }}-${{ runner.arch }}-${{ github.job }}-cargo-${{ hashFiles('**/Cargo.lock') }}
     - name: Build tests
       run: cargo test --no-run
     - name: Run tests
@@ -119,7 +119,7 @@ jobs:
           ~/.cargo/registry/cache/
           ~/.cargo/git/db/
           target/
-        key: ${{ runner.os }}-${{ github.job }}-cargo-${{ hashFiles('**/Cargo.lock') }}
+        key: ${{ runner.os }}-${{ runner.arch }}-${{ github.job }}-cargo-${{ hashFiles('**/Cargo.lock') }}
     - name: Check all targets
       run: cargo check --locked --all-targets --all-features
 
@@ -151,7 +151,7 @@ jobs:
           ~/.cargo/registry/cache/
           ~/.cargo/git/db/
           target/
-        key: ${{ runner.os }}-${{ github.job }}-cargo-${{ hashFiles('**/Cargo.lock') }}
+        key: ${{ runner.os }}-${{ runner.arch }}-${{ github.job }}-cargo-${{ hashFiles('**/Cargo.lock') }}
     - name: Run benchmarks
       run: cargo bench
 
@@ -183,7 +183,7 @@ jobs:
           ~/.cargo/registry/cache/
           ~/.cargo/git/db/
           target/
-        key: ${{ runner.os }}-${{ github.job }}-cargo-${{ hashFiles('**/Cargo.lock') }}
+        key: ${{ runner.os }}-${{ runner.arch }}-${{ github.job }}-cargo-${{ hashFiles('**/Cargo.lock') }}
     - name: Run Shuttle tests
       run: cargo test -p mountpoint-s3 --features shuttle -- shuttle
 
@@ -233,7 +233,7 @@ jobs:
             ~/.cargo/registry/cache/
             ~/.cargo/git/db/
             target/
-          key: ${{ runner.os }}-${{ github.job }}-cargo-${{ hashFiles('**/Cargo.lock') }}
+          key: ${{ runner.os }}-${{ runner.arch }}-${{ github.job }}-cargo-${{ hashFiles('**/Cargo.lock') }}
       - name: Run Clippy
         run: make clippy
 
@@ -262,7 +262,7 @@ jobs:
             ~/.cargo/registry/cache/
             ~/.cargo/git/db/
             target/
-          key: ${{ runner.os }}-${{ github.job }}-cargo-${{ hashFiles('**/Cargo.lock') }}
+          key: ${{ runner.os }}-${{ runner.arch }}-${{ github.job }}-cargo-${{ hashFiles('**/Cargo.lock') }}
       - name: Build CRT binding documentation
         run: cargo doc --no-deps -p mountpoint-s3-crt