feat: add ocsp-stapling plugin

[yuweizzz]

Description

Related: #10309

Checklist

• I have explained the need for this PR and the problem it solves
• I have explained the changes or the new features added to this PR
• I have added tests corresponding to this change
• I have updated the documentation to reflect this change
• I have verified that this change is backward compatible (If not, please discuss on the APISIX mailing list first)

[monkeyDluffy6017]

Thanks for your contribution! we will check this later

[monkeyDluffy6017]

Nice work！

[monkeyDluffy6017]

@yuweizzz please make the ci pass

[monkeyDluffy6017]

please merge the master branch

[yuweizzz]

merged.

[ssdr]

It seems that set_ocsp_resp is not correct when supporting multiple certificates.

apisix/apisix/plugins/ocsp-stapling.lua

Lines 152 to 170 in 11c9d29

	end
	local fin_pem_cert = value.cert
	-- multiple certificates support.
	if value.certs then
	for i = 1, #value.certs do
	local cert = value.certs[i]
	local key = value.keys[i]
	ok, err = radixtree_sni.set_pem_ssl_key(sni, cert, key)
	if not ok then
	return false, err
	end
	fin_pem_cert = cert
	end
	end
	local ok, err = set_ocsp_resp(fin_pem_cert,
	value.ocsp_stapling.skip_verify,
	value.ocsp_stapling.cache_ttl)

[yuweizzz]

It seems that set_ocsp_resp is not correct when supporting multiple certificates.

apisix/apisix/plugins/ocsp-stapling.lua

Lines 152 to 170 in 11c9d29

	end
	local fin_pem_cert = value.cert
	-- multiple certificates support.
	if value.certs then
	for i = 1, #value.certs do
	local cert = value.certs[i]
	local key = value.keys[i]
	ok, err = radixtree_sni.set_pem_ssl_key(sni, cert, key)
	if not ok then
	return false, err
	end
	fin_pem_cert = cert
	end
	end
	local ok, err = set_ocsp_resp(fin_pem_cert,
	value.ocsp_stapling.skip_verify,
	value.ocsp_stapling.cache_ttl)

Could you provide the log info or reproduction steps and create a new issue?