chore(doc): basic-based tutorials only in HTTP/2

Work done:

• Making all basic deployments use HTTP/2 only
• Removed all non-nrf basic deployments

Related MRs:

• Found an issue in AMF: oai-cn5g-amf!212 (merged)
• Thinh fixed an issue in UDR: oai-cn5g-udr!41 (merged)
• Using PCF MR for HTTP/2: oai-cn5g-pcf!29 (merged)
• Using SMF MR for HTTP/2 fix w/ PCF: oai-cn5g-smf!200 (merged)

docker-compose/docker-compose-slicing-basic-nrf.yaml

@@ -211,7 +211,7 @@ services:
             - UDM_API_VERSION=v2
             - UDM_FQDN=oai_udm
             - NSSF_IPV4_ADDRESS=192.168.70.132
-            - NSSF_API_VERSION=v1
+            - NSSF_API_VERSION=v2
             - NSSF_FQDN=oai-nssf
             # changes for HTTP2
             - USE_HTTP2=yes