Bump go.opentelemetry.io/collector/config/configtls from 0.82.0 to 1.21.0 in /testbed/mockdatareceivers/mockawsxrayreceiver

Bump go.opentelemetry.io/collector/config/configtls from 0.82.0 to 1.21.0 in /testbed/mockdatareceivers/mockawsxrayreceiver #30436