test/ech_test.c: avoid memory leaks in ech_api_basic_calls()

test/ech_test.c: avoid memory leaks in ech_api_basic_calls()

rinner and router should be freed after successful SSL_ech_get1_status()
calls.

Resolves: https://scan5.scan.coverity.com/#/project-view/65248/10222?selectedIssue=1681465
Resolves: https://scan5.scan.coverity.com/#/project-view/65248/10222?selectedIssue=1681466
Fixes: 5e5a76fc2c08 "Add tests and documentation and fix a couple of issues identified by added tests"
Signed-off-by: Eugene Syromiatnikov <esyr@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
MergeDate: Wed Feb 25 11:10:58 2026
(Merged from https://github.com/openssl/openssl/pull/30139)