LDAP: Allow setting minimum TLS version and accepted ciphers (#63646)

* update ldap library and use go module path

* add TLS min version and accepted min TLS version

* set default min ver to library default

* set default min ver to library default

* add cipher list to toml

* Update pkg/services/ldap/settings.go

Co-authored-by: Karl Persson <kalle.persson@grafana.com>

* Apply suggestions from code review

Co-authored-by: Christopher Moyer <35463610+chri2547@users.noreply.github.com>

* lint

---------

Co-authored-by: Karl Persson <kalle.persson@grafana.com>
Co-authored-by: Christopher Moyer <35463610+chri2547@users.noreply.github.com>

pkg/services/ldap/testdata/ldap.toml

@@ -4,6 +4,8 @@ port = 389
 use_ssl = false
 start_tls = false
 ssl_skip_verify = false
+tls_ciphers = ["TLS_CHACHA20_POLY1305_SHA256", "TLS_AES_128_GCM_SHA256"]
+min_tls_version = "tls1.3"
 bind_dn = "cn=admin,dc=grafana,dc=org"
 bind_password = '${ENV_PASSWORD}'
 search_filter = "(cn=%s)"
@@ -24,4 +26,3 @@ grafana_admin = true
 [[servers.group_mappings]]
 group_dn = "cn=users,ou=groups,dc=grafana,dc=org"
 org_role = "Editor"
-