fix CI: replace removed macOS runner, deprecated use of Command::cargo_bin() (#4134)

* fix(ci): update macOS intel runner version

* fix(cli/tests): replace use of deprecated `Command::cargo_bin()`

.github/workflows/sqlx-cli.yml

@@ -45,7 +45,7 @@ jobs:
           - ubuntu-latest
           # FIXME: migrations tests fail on Windows for whatever reason
           # - windows-latest
-          - macOS-13
+          - macOS-15-intel
           - macOS-latest
 
     timeout-minutes: 30
@@ -302,7 +302,7 @@ jobs:
         os:
           - ubuntu-latest
           - windows-latest
-          - macOS-13
+          - macOS-15-intel
           - macOS-latest
         include:
           - os: ubuntu-latest
@@ -312,7 +312,7 @@ jobs:
           - os: windows-latest
             target: x86_64-pc-windows-msvc
             bin: target/debug/cargo-sqlx.exe
-          - os: macOS-13
+          - os: macOS-15-intel
             target: x86_64-apple-darwin
             bin: target/debug/cargo-sqlx
           - os: macOS-latest