Replace all calls to `get_initial_sptr` with `make_block_sptr`

First batch of changes:

```
find […] -print0 | xargs -0 sed -i -r '/get_initial_sptr/{:nxt N;/;/!b nxt;s/get_initial_sptr\(\s*new ([^(]+)(.*)\)\)/make_block_sptr<\1>\2)/}'
```

Then:
* Back out `sptr_magic.h` edits
* Change some `friend` clauses
* clang-format the whole thing
* Update checksums in the pybind11 bindings files

3 files changed, 3 insertions, 3 deletions

diff --git a/gr-wavelet/lib/squash_ff_impl.cc b/gr-wavelet/lib/squash_ff_impl.cc
index 6a958a0be..ec5b4d314 100644
--- a/gr-wavelet/lib/squash_ff_impl.cc
+++ b/gr-wavelet/lib/squash_ff_impl.cc
@@ -25,7 +25,7 @@ namespace wavelet {
 squash_ff::sptr squash_ff::make(const std::vector<float>& igrid,
                                 const std::vector<float>& ogrid)
 {
-    return gnuradio::get_initial_sptr(new squash_ff_impl(igrid, ogrid));
+    return gnuradio::make_block_sptr<squash_ff_impl>(igrid, ogrid);
 }
 
 squash_ff_impl::squash_ff_impl(const std::vector<float>& igrid,
diff --git a/gr-wavelet/lib/wavelet_ff_impl.cc b/gr-wavelet/lib/wavelet_ff_impl.cc
index 912115e11..72287374e 100644
--- a/gr-wavelet/lib/wavelet_ff_impl.cc
+++ b/gr-wavelet/lib/wavelet_ff_impl.cc
@@ -26,7 +26,7 @@ namespace wavelet {
 
 wavelet_ff::sptr wavelet_ff::make(int size, int order, bool forward)
 {
-    return gnuradio::get_initial_sptr(new wavelet_ff_impl(size, order, forward));
+    return gnuradio::make_block_sptr<wavelet_ff_impl>(size, order, forward);
 }
 
 wavelet_ff_impl::wavelet_ff_impl(int size, int order, bool forward)
diff --git a/gr-wavelet/lib/wvps_ff_impl.cc b/gr-wavelet/lib/wvps_ff_impl.cc
index 3e5ae9ee0..e1ffa39ec 100644
--- a/gr-wavelet/lib/wvps_ff_impl.cc
+++ b/gr-wavelet/lib/wvps_ff_impl.cc
@@ -29,7 +29,7 @@ static int ceil_log2(int k)
 
 wvps_ff::sptr wvps_ff::make(int ilen)
 {
-    return gnuradio::get_initial_sptr(new wvps_ff_impl(ilen));
+    return gnuradio::make_block_sptr<wvps_ff_impl>(ilen);
 }
 
 wvps_ff_impl::wvps_ff_impl(int ilen)