SecurityPkg: SecureBootVariableProvisionLib: Updated implementation

SecurityPkg: SecureBootVariableProvisionLib: Updated implementation

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3910

This change is in pair with the previous SecureBootVariableLib, which
removes the explicit invocation of `CreateTimeBasedPayload` and used new
interface `EnrollFromInput` instead.

The original `SecureBootFetchData` is also moved to this library and
incorporated with the newly defined `SecureBootCreateDataFromInput` to
keep the original code flow.

Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Jian J Wang <jian.j.wang@intel.com>
Cc: Min Xu <min.m.xu@intel.com>
Signed-off-by: Kun Qin <kun.qin@microsoft.com>
Reviewed-by: Jiewen Yao <Jiewen.yao@intel.com>
Acked-by: Michael Kubacki <michael.kubacki@microsoft.com>