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)