cmake: tidy up and document feature detections in dependencies

- update text on dependency feature detection variables, and move it
  to its own section in `docs/INSTALL-CMAKE.md`.
  Ref: #17032 (Discussion)

- tidy up descriptions/comments, alpha-sort.

- move comment to its own section in `docs/INSTALL-CMAKE.md`.

- split `HAVE_SSL_SET_QUIC_USE_LEGACY_CODEPOINT` to distinct names for
  each TLS backend API. To make the names more stable and to sync them
  with autotools.
  Follow-up to 07cc50f8eb #17018
  Follow-up to 342a654ef3 #15873

- drop redundant condition while detecting QUICTLS API.
  Follow-up to 07cc50f8eb #17018

- add config-comparison exception for `HAVE_SSL_SET_QUIC_TLS_CBS`.
  Follow-up to 5eefdd71a3 #17027

- detect `wolfSSL_get_peer_certificate` like autotools does.

- detect `wolfSSL_UseALPN` like autotools does.

Closes #17082

lib/curl_config.h.cmake

@@ -703,6 +703,12 @@ ${SIZEOF_TIME_T_CODE}
 /* if wolfSSL is enabled */
 #cmakedefine USE_WOLFSSL 1
 
+/* if wolfSSL has the wolfSSL_get_peer_certificate function. */
+#cmakedefine HAVE_WOLFSSL_GET_PEER_CERTIFICATE 1
+
+/* if wolfSSL has the wolfSSL_UseALPN function. */
+#cmakedefine HAVE_WOLFSSL_USEALPN 1
+
 /* if wolfSSL has the wolfSSL_DES_ecb_encrypt function. */
 #cmakedefine HAVE_WOLFSSL_DES_ECB_ENCRYPT 1