Separate compilation and linker phases (#376)

Separate between compilation and linker phases to allow deploy time
linking and back-porting era compiler changes to fix #91. Unlinked
contract binaries (caused by missing libraries or missing factory
dependencies in turn) are emitted as raw ELF object.

Few drive by fixes:
- #98
- A compiler panic on missing libraries definitions.
- Fixes some incosistent type forwarding in JSON output (empty string
vs. null object).
- Remove the unused fallback for size optimization setting.
- Remove the broken `--lvm-ir`  mode.
- CI workflow fixes.

---------

Signed-off-by: Cyrill Leutwiler <bigcyrill@hotmail.com>
Signed-off-by: xermicus <bigcyrill@hotmail.com>
Signed-off-by: xermicus <cyrill@parity.io>

crates/linker/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "revive-linker"
-version.workspace = true
+version = "0.2.0"
 license.workspace = true
 edition.workspace = true
 repository.workspace = true
@@ -8,10 +8,10 @@ authors.workspace = true
 description = "revive compiler linker utils"
 
 [dependencies]
-tempfile = { workspace = true }
-polkavm-linker = { workspace = true }
-libc = { workspace = true }
 anyhow = { workspace = true }
+libc = { workspace = true }
+polkavm-linker = { workspace = true }
+tempfile = { workspace = true }
 
-revive-builtins = { workspace = true }
 lld-sys = { workspace = true }
+revive-builtins = { workspace = true }