rust: Generate shell (e.g. bash) completion scripts via build.rs for all tools

It might be handy to have shell completion support for the Rust PV
tools.

Reviewed-by: Steffen Eiden <seiden@linux.ibm.com>
Signed-off-by: Marc Hartmayer <mhartmay@linux.ibm.com>
Signed-off-by: Steffen Eiden <seiden@linux.ibm.com>

rust/Cargo.lock

@@ -127,6 +127,15 @@ dependencies = [
  "terminal_size",
 ]
 
+[[package]]
+name = "clap_complete"
+version = "4.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7f6b5c519bab3ea61843a7923d074b04245624bb84a64a8c150f5deb014e388b"
+dependencies = [
+ "clap",
+]
+
 [[package]]
 name = "clap_derive"
 version = "4.3.2"
@@ -403,6 +412,7 @@ name = "pvapconfig"
 version = "0.10.0"
 dependencies = [
  "clap",
+ "clap_complete",
  "lazy_static",
  "openssl",
  "rand",
@@ -420,6 +430,7 @@ dependencies = [
  "anyhow",
  "byteorder",
  "clap",
+ "clap_complete",
  "log",
  "s390_pv",
  "serde",
@@ -434,6 +445,7 @@ version = "0.10.0"
 dependencies = [
  "anyhow",
  "clap",
+ "clap_complete",
  "log",
  "s390_pv",
  "serde_yaml",