chore: refine SQLx test commands to conditionally include mysql-rsa feature based on TLS configuration

Author: dertin

.github/workflows/sqlx.yml

@@ -379,7 +379,7 @@ jobs:
         run: >
           cargo test
           --no-default-features
-          --features any,mysql,macros,migrate,_unstable-all-types,runtime-${{ matrix.runtime }},tls-${{ matrix.tls }}
+          --features any,mysql,${{ matrix.tls == 'none' && 'mysql-rsa,' || '' }}macros,migrate,_unstable-all-types,runtime-${{ matrix.runtime }},tls-${{ matrix.tls }}
         env:
           DATABASE_URL: mysql://root:password@localhost:3306/sqlx
           SQLX_OFFLINE_DIR: .sqlx
@@ -416,7 +416,7 @@ jobs:
           cargo test
           --no-default-features
           --test mysql-macros
-          --features any,mysql,macros,migrate,_unstable-all-types,runtime-${{ matrix.runtime }},tls-${{ matrix.tls }}
+          --features any,mysql,${{ matrix.tls == 'none' && 'mysql-rsa,' || '' }}macros,migrate,_unstable-all-types,runtime-${{ matrix.runtime }},tls-${{ matrix.tls }}
         env:
           DATABASE_URL: mysql://root:password@localhost:3306/sqlx
           SQLX_OFFLINE: true