update to proxmox-sys 0.2 crate

- imported pbs-api-types/src/common_regex.rs from old proxmox crate
- use hex crate to generate/parse hex digest
- remove all reference to proxmox crate (use proxmox-sys and
  proxmox-serde instead)

Signed-off-by: Dietmar Maurer <dietmar@proxmox.com>

pbs-datastore/Cargo.toml

@@ -11,6 +11,7 @@ base64 = "0.13"
 crc32fast = "1"
 endian_trait = { version = "0.6", features = [ "arrays" ] }
 futures = "0.3"
+hex = "0.4.3"
 lazy_static = "1.4"
 libc = "0.2"
 log = "0.4"
@@ -25,14 +26,13 @@ zstd = { version = "0.6", features = [ "bindgen" ] }
 pathpatterns = "0.1.2"
 pxar = "0.10.1"
 
-proxmox = "0.15.3"
 proxmox-borrow = "1"
 proxmox-io = "1"
 proxmox-lang = "1"
 proxmox-schema = { version = "1", features = [ "api-macro" ] }
 proxmox-time = "1"
 proxmox-uuid = "1"
-proxmox-sys = "0.1.2"
+proxmox-sys = "0.2"
 
 pbs-api-types = { path = "../pbs-api-types" }
 pbs-tools = { path = "../pbs-tools" }