DTLS 1.3: Don't error out on app data before finishing handshake #2283

Job	Run time
Build UML (UserMode Linux)	3s
Build wolfSSL (hostap-vm-build1, --disable-tls13)	1m 49s
Build wolfSSL (hostap-vm-build2, --enable-wpas-dpp --enable-brainpool --with-eccminsz=192 --enabl...	2m 23s
hwsim test (true, true, hostap_2_10, true, hostap-vm-build1)	1m 29s
hwsim test (true, true, 07c9f183ea744ac04585fb6dd10220c75a5e2e74, e1876fbbf298ee442bc7ab8561331eb...	8m 17s
hwsim test (true, false, hostap_2_10, true, hostap-vm-build1)	1m 19s
hwsim test (true, false, 07c9f183ea744ac04585fb6dd10220c75a5e2e74, e1876fbbf298ee442bc7ab8561331e...	8m 18s
hwsim test (false, true, hostap_2_10, true, hostap-vm-build1)	1m 18s
hwsim test (false, true, b607d2723e927a3446d89aed813f1aa6068186bb, ad5b52a49b3cc2a5bfb47ccc1d6a51...	4m 27s
hwsim test (false, true, 07c9f183ea744ac04585fb6dd10220c75a5e2e74, e1876fbbf298ee442bc7ab8561331e...	8m 8s
	37m 31s

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